The 25th anniversary is just a few weeks away, the announcements and teases are slowly trickling out, and we might have a heads up on one announcement. According to a poster at Reddit, there might be a Sonic Humble Bundle on the way.
The bundle in question seems to be as follows.
Pay what you want (single combined key)
- Sonic the Hedgehog
- Sonic 3D Blast
- Sonic Adventure DX
Beat the Average (single combined key)
- Sonic CD
- Sonic Adventure 2
- Sonic Adventure 2: Battle Mode
- Sonic the Hedgehog 2
- Sonic and SEGA All Stars Racing
- Sonic the Hedgehog 4 Episode I
Pay $10 (single combined key)
- Sonic & All-Stars Racing Transformed
- Sonic and All-Stars Racing Transformed Metal Sonic
- Sonic and All-Stars Racing Transformed Yogscast
- Sonic and All-Stars Racing Transformed Ryo Hazuki
- Sonic the Hedgehog 4 Episode II
- Sonic Generations
- Sonic Generations – Casino Nights
- Sonic Lost World
- Sonic Lost World – NiGHTMARE Zone
Second Week BTA Bonus (single combined key)
- Sonic Spinball
- Sonic 3 and Knuckles
- Dr. Robotnik’s Mean Bean Machine
To further support this claim, there are a number of items recently added to the Steam Database which seems to indicate that this is indeed happening.
https://steamdb.info/sub/110002/apps/
https://steamdb.info/sub/110003/apps/
https://steamdb.info/sub/110004/apps/
No idea when these will go live on the humble bundle store, but odds are it should be this month.
Source: Reddit.