Re: May the 4 and Star Wars: Battlefront 2 - Han solo season.
Well, clone wars has exactly the same amount of content than the other two eras.
Two maps in SA Ryloth & Kamino
Three Maps in GA Kashyyyk, Kamino and Naboo
+ they also got two special maps (which were not "cut out" of the big ones) Naboo Hangar + Kashyyyk Treehouse.
The only point were you are totally right is the lack of heroes for that era.
And yes Obi Wan, Anakin Grievous and Dooku are definitely missing, but I dont mind waiting for them. At least this way I can look forward to future content. However, I'd like to see Tarkin and Thrawn just as much as Id like to see Grievous and Dooku.
About the movie - we just dont know what we get. Personally, Id liked the Last Jedi Season in Battlefront much more than the movie. Phasma is by far not such a huge disappointment as she was in the movie. Actually I really like her in the game. I like the Crait map design, the idea they had with the "smoke screen speeders" and the battle is more fun than it was to watch it in the cinema. But again, thats just my opinion.
So aside from the obvious "young" skins, we know nothing. I hope we get a map in/on the moving train, that'd be great!