psylocke's if firmly under the x-rights; however if brian falls under marvel i could see them creating a female braddock cousin who idolizes/idolized betsy and is an inhuman. hell odds are they'd do likewise if they wanted a 616 spider-uk
Regarding the Sentinels ; I'd LOVE to read a story that reveals how a Sentinel distinguishes a mutant Psylocke, Sunspot from a
Inhuman Black Bolt, Crystal
Superhuman Spider-Man, Wasp
Eternal Sersi, Starfox
Asgardian Amora, Sif
Olympian Ares, Hermes
I figure the difference lies in the energy signature of the individual in question.