So,Hasbro is planning to do this kind of crossover event for years. They got things started a little with the Unit E comic which had re-imaginings of different toy properties. All of them would've crossover with the Transformers Prime cartoon but it failled.
Now they want to do this Cinematic Universe and we're going to see Microanuts and G.I.Joe getting a bigger push.
Micronauts cartoon is coming in 2019 and live action movie in 2020.
G.I.Joe reboot in 2020.
ROM and D&D movies in 2021. All under the new company "Allspark Pictures" which will have its first movie to hit theaters this Christmas,called Bumblebee. Hopes for future toy lines reboots? Hopes for G.I.Joe reboot? Micronauts?
Other movies in development:
>Snake Eyes spin off
>M.A.S.K. movie
>VISIONARIES movie
>Transformers reboot