Roy Thomas actually brought these Sentinels back in an old Avengers two-parter. Their new plan for wiping out mutants involved kidnapping the Scarlet Witch so that they could use her hex powers to sterilize all humanity and prevent the birth of future mutants. Quicksilver kidnapped Larry Trask for help, and Larry pointed out that their exposure to the sun's radiation had mutated their thinking process, so as mutants, they should exterminate themselves (which they did, and Larry Trask got squished, poor bastard).