I see potentially a few scenarios playing out.
A: They both fuse and somehow end up being God tier (Highly unlikely, I think)
B: They fuse with Piccolo and this somehow ties U7, and U6's survival where if Piccolo is knocked out U6 is eliminated since he'd technically be their last warrior (maybe?) or they convince Zeno to let U6 rally together with U7 because it would be cool.
C: We get some sick callbacks to King Piccolo. Such as these Namekians are able to birth warriors from their eggs and that's how they survive. Maybe they can absorb them for a short power boost. I don't know
I'd personally like C since King Piccolo was fantastic and I'd love to see them create a mini army.