What we can figure out about this movie

[neatoman]

So from what we can tell so far about this movie is:

1. There will be a scene during a costume party, April is attending it.
2. There will be scene where April is being chased holding a purple canister.
3. The Foot Ninja have had their costumes changed from the iron masks, to the more recognisable bug eye costumes.
4. Baxter Stockman will be wearing formal wear.
5. The new vehicle will be a garbage truck painted like the party wagon and "Tartaruga Brothers" painted on the side like the second Battle Shell.
6. Bebop and Rocksteady will be in the movie.
7. Shredder and Sacks are returning.
8. Casey will be in at least one scene during night time.
9. Some scenes will be filmed in a more rural area.

Not much to go on as of yet but I do get a rough picture in my head.

Baxter has taken control over Sack's assets. He is working with the Shredder to create Bebop and Rocksteady. April finds out Baxter is up to no good, possibly through Sacks. Baxter holds a party to celebrate how he managed to salvage Sacks industries or something. April attends this party to get access to Baxter's labs. She steals something important. She chased by ninjas and is rescued by Casey. The Turtles', Casey and April flee to the farmhouse. They build a new combat vehicle to launch an attack on Baxter's lab.

That's more or less what I can interpret from what we know, obviously it's lacking in clear details but I'm not going to throw out something that is too speculative.