ExoticSenta
I think him going to Ben 10 after those 2 worlds could be worthwhile for him and his universe. He could copy all of the 1 million+ dna samples in the omnitrix and get new life forms to add to his planets and possibly fight a celestialsapien to test his new powers. Should also be a good pass-time for him to study the omnitrix and try to upgrade it to ridiculous proportions.
I feel like Aly was forced into the plot so hard that it's like he went off and adopted a dog because his wife was away and paid way too much for it. Her entire existence is to be a soundboard to explain things to the readers and be eye candy. Heck, I actually like fluffy more than her and they are an actual pet.