Fans of Marvel's Doctor Doom

If this was an obvious turn for villainy, I'd guess it was some vague nefarious purpose, but now it's... what, him guarding/watching them? I don't love that he was in the dark, but working with what we have, lol that's oddly sweet, considering Reed apparently left Ben and Johnny behind to do the same for Doom.

Yeah. "I want to know what Reed's doing out there and I need you two to find him, so I'll manipulate you into searching even though you think he's dead," makes perfect sense as a Doomy motive. Without that element, you've got, what, "You two seem to be having trouble getting over your grief, let's all go on a quest together to get some closure and bond"? Okay! (In retrospect, it's also pretty hilarious that Reed's response to Doom claiming his wife and kids for his own in Secret Wars was apparently, "Well, okay then, if you want in on the whole F4 family thing I'll leave Ben and Johnny for you to hang out with." It's almost like he's trying to encourage Doom to learn to bond with the family members he doesn't like so much after he's proven he can get on okay with the others.)