As an act of public service the person behind the username Hasney has started a thread on NeoGAF where we discloses every match type and mode he's found to be missing in WWE 2K15 for PlayStation 4 and Xbox One. He's looked through videos and screenshots from the game, and here's a list of what's apparently missing from the new gen versions:
1 vs 1:
- Inferno
- Ladder
- I Quit
- 2 out of 3 Falls
- Special Referee (yet is in the showcase mode)
- Casket (yet is in the Showcase mode)
- 3 stages of hell (Yet is in the showcase mode)
- Backstage Brawl
2 vs 2:
- Tornado Tag
- Extreme Rules
- Hell in a Cell
- Ladder
- Steel Cage
- Table
- TLC
- Elimination Tornado
- Elimination Table
- Mixed
- Backstage Brawl
Creation modes:
- Create a Diva
- Create a Title
- Create an Arena
- Custom Themes
- All custom entrances other than the guy talking on his phone. Only roster member entrances
- Create a Finisher
Handicap Matches:
- All handicap matches
Fatal 4 Way/4-Man:
- Battle Royal
- Hell in a Cell
- Ladder
- Steel Cage
- Table
- TLC
- Falls Count Anywhere
- 2 out of 3 Falls
- No DQ
- Backstage Brawl
Triple Threat:
- Falls Count Anywhere
- 2 out of 3 Falls
- No DQ
- Ladder
- Steel Cage
- TLC
- Backstage Brawl
6-Man:
- Elimination Chamber Tag
- Championship Scramble (Was removed in 2k14, but notable still)
Thanks: Attackofthefanboy.