Bullseye's might be What If Killmonger? whi h might just be MCU Killmonger... which might be from something even earlier. But those all had pins and this looks pinless, so maybe I'm crazy.
I don't know about Muse. The seam on the leg is throwing me.
I think the Bullseye legs are the ones from Old Man Hawkeye and the last Blade figure, which to be honest I wasn't that impressed with - maybe I'm wrong but yeah I think it's them.
Muse seems like he has new legs that I don't recognise, so maybe with those being some of the new parts they wanted to really make best reuse of existing parts elsewhere. That annoys me as with the upper body of Bullseye they could have made it reuse the Vulcan body so that his bare forearms could make use of the separated design on those and he could have cut a slightly more muscular silhouette to go with the overall tactical look.
When they make figures with this kind of reuse and loosey-goosey accuracy to any one specific style - and these sit in a grey area between comic and MCU, kinda just needing to be 'close enough', it does feel a bit like I'm being dared by Hasbro to make my own customs and see if I can make a close enough version, rather than dropping a whole 50 quid. I put the set in my basket once the subscriber priority window had passed, and now I'm like 'eh, I could do without pouncing on these as I have parts enough lying around that I could make similarly 'close enough' kitbashes.
I'm not even really sure if I'm sold on the whole concept of Muse really, I always like having more Daredevil characters but other than having a kinda cool look, he's ridiculous in the tv series (those numbers of victims and nobody has noticed???!!!!) and even more absurd in the comic. The powers and abilities synopsis on his wiki page sounds like the gibberings of a 12 year old who made him up in ten minutes.
If this set is hanging around a while and ends up in the Outlet section like the Thunderbolts 2-packs I might pick it up but as such I'm thinking I should hold off and instead maybe just pick up a flipped Bullseye from somebody who didn't want him.