Everything that has been suggested would be good for the Big T to bring out next.
Here's my wish list for Tamiya (in no particular order):
1. An updated 88. Prefer the Pak 43 on the cruciform base w/bogies.
2. A truly retooled Sherman (Especially the running gear, lets get a true mid-VVSS and an E8)!! Please, please do it right this time Tamiya!
3. A truly retooled Lee/Grant
4. An early Panzer IV (like a retooled D)
5. Panzer IV E, F1, F2, and G (this could easily be one kit with optional parts)
6. A truly retooled M5/M8
7. A Russian 203mm (you know the one with the tracked carriage. And while your at it throw in the prime mover too!)
8. Any of the French WWII tanks (take your pick, the field is wide open)
9. An Italian Sahariana
10. An Italian AB40
11. A Bussig Nag (with the crane too!)
This is kind of my "short" list.
Oh well, there's always hope. And if not hope, there's resin!