Work on preparing Thanosieds forces a bit more, an all out invasion at this point in time would just resemble "One Universe" a little to much. Its just a little to early, but once everyone has established there characters a bit more feel free! Maybe you could have him going after the Iron Lantern specificaly because of his alien powers, and all other the other green lanterns or whatver Amalgam calls them.
Also you should proboby make Lanterns interaction with the infiants a little less specific, he would know what they were. try to just decribe them more than giving them a name, that is unless his Armor is somehow telling him what they are, than that would make perfect sence
Also there arnt realy to many heroes right now so that term wouldnt be used to much, ocasionaly yes, but as in a mass amount of them, we havent see but a few yet. The biggest issue right now are metamutants and the public fear of them, and specif peoples interest in them. Maybe Thanosied could go after the Metamutans? Try to collect ones with powers that could benift him.
Just a few ideas, keep up the good work!