Any news on next Capital ship?

You mean that stolen imperial cruiser? I think some pirate ships are coming. New pirate ship faction maybe.

My guess is the next Capital Ship is going to be Mandalorian. Since they are freeing Razor Crest from the BH lineup, it makes sense right? 
And to harden this "tin foil" idea :) remember we hardly have 1, not complete, Separatist fleet. 

Cadence would have it be a light side ship, no? last ship was Revan's (dark side) and for GL Capital ships (so to speak) we have 2 dark (exec and revan) and one light side (profundity).

But yeah, they're overly buried in ahsoka. GLAT, Baylon, then almost guaranteed new thrawn (GLAT1 and GLAT2?). They're aren't enough ships for the capital ships we already have.

The Endar Spire, along with new Old Republic ships

I mean the shuttle that she used all the time. Anyway, just a wild thought. 

Would like to see Darth Nihilus' ship the Ravager as the next capital ship.
https://starwars.fandom.com/wiki/Ravager_(Centurion-class)

What asohka ships? You have her ship, thrawns, which is already in the game, and that's basically it other than the big space circle. Could add a space whale I guess as an unpiloted ship :)

oh yeah. thx.

T6-1974, featuring Ahsoka Tano (Fulcrum) and a new unit, Huyang, as Crew

You mean Revan's.