mothership/giant ship for each race similar to Guardians in Endless Legend

Yeah! And I've got some specific ideas for those "Ultimate Ships"

Ultimate Guardian (Earth): High HP, lots of slots for defense modules, very high chance to be targeted.

Ultimate Striker (FIre): High ATK, lots of slots for attack modules, weapon effenciency forced to 150% at all range (which implies missiles will be able to fire at close range and plasma will fire at medium and long, as they got their "effenciency" at these ranges from ship type)

Ultimate Supporter (Dust): Lots of slots for spportive modules, have strategical abilities like "instant repair (repair all friendly fleets within the same system instantly)" and "manpower teleportation (draw manpower from an owned, 100% ownership system to all owned fleets in the same system.)"

Ultimate Razer (Water): Lots of manpower, slots for siege weapons, built-in Core cracker.

Ultimate Responder (Air): All-rounder ultimate ship, have high speed and can teleport.

This looks cool and seems like a good DLC, but not as Puraliuna said with Elements, that doesn't looks good with Endless Space 2, maybe "elements" but not the normal ones, Metal ones or something like that. (I don't know, A fire ship? xD that sounds too weird)

I like it.

Maybe each one could correspond with a resource like hyperium or titanium. I thinK I'd still prefer each race having their own but that could be cool too.