In my opinion, Ginga kinda fails as anniversary.
I mean, we had:
1. Nexus which is one of the best in Tokusatsu ever.
2. Mebius, which was fantastic in both being part of the shared universe and being a standalone thing (learn from him, Ginga)
3. Ultra Galaxy, which was creative and overally pretty good.
4. 3 Zero movies. Each and every one of them being just awesome (Personally not fond of Saga, but still).
And then we have... Ginga.
Yeah, build up ws pretty awesome. Ultra-dimesional war, Ultramen and Kaiju trapped in Doll Sparks by a super-powerful enemy and Earth as place for a big battle again. I didin't even really mind first half of the Ginga that much. I though it all was just a build up for that big epic, which will follow later. But we got some bullshit, instead. Ginga overally is so anticlimatic, despite being an anniversary etc.
Where are the past actors? If this is an alternative universe, where are The Zero Force? Dyna? ANYONE? Yeah, we've got Taro and 60-lenght anniversary movie with barely any past Ultra in.