I believe that all the new engines we've seen on Amazon are Series 5. Maybe a couple of them are for later release as five of the Sweets engines are listed and I don't think a complete theme of five engines would be put in one blind bag series.
Many other engines have either been assumptions because there has been no Classics version but a themed version has been shown, others have been seen on eBay, and the rest have been released in the DC Super Friends multi-pack and I believe are very likely getting a blind bag release. These engines are:
Ferdinand
Rosie
Belle
Iron 'Arry
Creature Stanley
Creature Gator
Sports Dash
Patchwork Hiro
Fruit Chews Henry
Sugar Daddy Toby
Thomas as a Skeleton (possibly Spooky)
Unknown Green Bill or Ben
Toby as Blue Beetle
Emily as Poison Ivy
Diesel as Two-Face (unsure about this one)
And the DC Super Friends engines most likely awaiting blind bag release are:
Edward as Black Adam
Henry as Green Arrow
Emily as Wonder Woman
Iron 'Arry as Shazam!
Paxton as Lex Luthor
Sidney as the Penguin
Luke as Beast Boy
Stephen as Sinestro
Gator as Green Lantern
That's about 15 DC Super Friends engines all up, resulting in about four released at a time during Series 5-8.
DalaGStanator wrote
Tootsie Roll? What will they think of next?
I wonder if those two are based on the actual episodes.
I don't personally understand the choice of Tootsie Roll as I can't imagine them being relevant to anywhere outside the US. Yes, there is going to be a theme based off episodes and they are part of it.
roberte wrote
Any guess as to when Toys R Us will start selling the minis?
Next year? All they're selling right now is the Collector's Playwheel.
EDITED with newly discovered engines.