I'd have to agree that Spider-Man seems most likely, with Molten Man and Hydro-Man as pretty much locks.
I'm less sure about the updates from 8 and 10 years ago - it seems like the only ones that would fit are Menace and Tarantula, and they don't seem like high priorities for redos. If comic and movie versions don't count, it could be Shocker or Kraven for 10, which would make a lot more sense.
One of the recently made characters could be a new Spidey variant, and would also be the overlap character for wave 76. The other could be Ben Reilly Spider-Man, who was in TRU 24 as Scarlet Spider, and hasn't been made in that costume in a while.
I'd rather not get another Spider-Man wave so quickly, but if Abe Jenkins Beetle is one of the unmade characters I'll be happy.