Today marks the digital release of Ghostbusters: Answer the Call and the great news is that it's absolutely packed with bonus features (there's almost 35 minutes of "Jokes A Plenty" alternate improv lines on their own). As discussed on the Interdimensional Crossrip podcast, you can almost view the entirety of the four-hour assembly cut between the Extended Version of the film, the deleted scenes, and over an hour of deleted and alternate scenes available via streaming.
There are already quite a few exclusives that are known out there, and there has been a lot of grouping/generalizing in terms of what bonus materials are included in the release - so in an effort to help clarify, I'll do my best to catalog the extras and what platforms they're available on. This article will be updated periodically as information is received/confirmed as to which is on which release, so keep checking back for updates.
KEY: (BD) - Blu-ray Multidisc Package, (IT) - iTunes Digital Release, (VU) - Vudu Digital Release, (AZ) - Amazon Digital Release, (MS) - Microsoft Digital Release, (PS) - Playstation Store Digital Release, (GP) - Google Play Digital Release), (FS) - FIOS Digital Release, (XF) - Xfinity Digital Release, (BB) - Best Buy CinemaNow/UltraViolet Digital Release, (SPS) - Sony Pictures Store/UltraViolet Digital Release, (TG) - Target Exclusive Disc Pack-In
Full Feature Films
Extended Cut of Film (TRT 02:13:42) - (BD, IT, VU)
Theatrical Cut of Film (TRT 01:56:28) - (BD, IT, VU)
Deleted and Alternate Scenes
Past Lives (TRT 00:02:05) - (BD, IT, VU)
The Big Test (TRT 00:00:45) - (BD, IT, VU)
The Breakup (TRT 00:06:28) - (BD, IT, VU)
Where Are You? (TRT 00:00:27) - (BD, IT, VU)
Erin Walks to Class (TRT 00:00:51) - (IT, VU - Streaming Only)
Phil & Phyllis (TRT 00:04:33) - (IT, VU - Streaming Only)
The Duke (TRT 00:02:30) - (IT, VU - Streaming Only)
Erin Gets Fired (TRT 00:03:36) - (IT, VU - Streaming Only)
The Dean (TRT 00:02:04) - (IT, VU - Streaming Only)
Tired Shanks (TRT 00:00:55) - (IT, VU - Streaming Only)
No Graffitti[SIC] (TRT 00:03:10) - (IT, VU - Streaming Only)
Bennie & Erin (TRT 00:01:11) - (IT, VU - Streaming Only)
The Longest Job Interview Ever (TRT 00:14:20) - (IT, VU - Streaming Only)
Tamar (TRT 00:00:53) - (IT, VU - Streaming Only)
Secret Handshake (TRT 00:02:58) - (IT, VU - Streaming Only)
Patty's Car (TRT 00:01:49) - (IT, VU - Streaming Only)
Mrs. Potter (TRT 00:03:09) - (IT, VU - Streaming Only)
Backstories (TRT 00:04:38) - (IT, VU - Streaming Only)
Protect the Barrier (TRT 00:03:08) - (IT, VU - Streaming Only)
The Beasts of Mayhem (TRT 00:00:44) - (IT, VU - Streaming Only)
The Singer Gets High (TRT 00:02:56) - (IT, VU - Streaming Only)
Casper (TRT 00:01:51) - (IT, VU - Streaming Only)
The Mayor's Office (TRT 00:08:07) - (IT, VU - Streaming Only)
Car Trouble (TRT 00:02:21) - (IT, VU - Streaming Only)
A Sale on Bonsai (TRT 00:01:28) - (IT, VU - Streaming Only)
Soups & Salad (TRT 00:04:01) - (IT, VU - Streaming Only)
Evacuate the City (TRT 00:02:23) - (IT, VU - Streaming Only)
Visine (TRT 00:01:16) - (IT, VU - Streaming Only)
Bring It In (TRT 00:01:24) - (IT, VU - Streaming Only)
So Glad You Came Back (TRT 00:04:33) - (IT, VU - Streaming Only)
Where's The Walkie? (TRT 00:01:56) - (IT, VU - Streaming Only)
Uncle Bill (TRT 00:01:40) - (IT, VU - Streaming Only)
Rebecca Gorin (TRT 00:01:58) - (IT, VU - Streaming Only)
The New Book (TRT 00:01:19) - (IT, VU - Streaming Only)
Behind the Scenes
Meet the Team (Featurette) (TRT 00:08:03) - (BD, IT, VU)
The Ghosts of Ghostbusters (Featurette) (TRT 00:13:56) - (BD, IT, VU)
Visual Effects: 30 Years Later (Featurette) (TRT 00:15:16) - (BD, IT, VU)
Slime Time (Featurette) (TRT 00:05:15) - (BD, IT, VU)
Chris Hemsworth is Kevin (Featurette) (TRT 00:07:42) - (BD, IT, VU)
Recreating the World of Ghostbusters (Featurette) (TRT Unknown) - (TG - Target Exclusive Bonus Disc)
Stunt Busters! (Featurette) (TRT 00:13:04) - (IT - iTunes Exclusive)
Stunt Coordinator Walter Garcia's Original Stunt-Viz for the Times Square Battle (Featurette) (TRT 00:03:38) - (IT - iTunes Exclusive)
The Full Version of the Times Square Fight with No Visual Effects (Featurette) (TRT 00:05:41) - (IT - iTunes Exclusive)
The Ecto-1 Vignette (Featurette) (TRT 00:01:56) - (VU - Vudu Exclusive - Previously Released as Marketing)
Gag Reel Round 1 (TRT 00:07:34) - (BD, IT, VU)
Gag Reel Round 2 (TRT 00:07:59) - (BD, IT, VU)
Jokes A Plenty - "Free For All" (Alternate Takes/Lines) (TRT 00:11:48) - (BD, IT, VU)
Jokes A Plenty - "Holtzmann Gone Wild" (Alternate Takes/Lines) (TRT 00:09:33) - (BD, IT, VU)
Jokes A Plenty - "The Patty Show" (Alternate Takes/Lines) (TRT 00:05:36) - (BD, IT, VU)
Jokes A Plenty - "Kevin Unleashed" (Alternate Takes/Lines) (TRT 00:04:19) - (BD, IT, VU)
Jokes A Plenty - "The Bird" (Alternate Takes/Lines) (TRT 00:02:25) - (BD, IT, VU)
Jokes A Plenty - "The Dean Goes Down" (Alternate Takes/Lines) (TRT 00:00:50) - (BD, IT, VU)
Miscellaneous Bonus Features
Rowan's Manifesto (Direct to Camera Video Manifesto - Viral Video?) (TRT 00:00:47) - (IT, VU)
Elle King "Good Girls" Music Video (TRT 00:03:09) - (IT - iTunes Exclusive)