Looks like Pietro is gonna get the Rahne treatment.
'No PAD, we don't want these second and third-tier characters we don't appreciate. I can't imagine why you even would. Aren't they all just crappy losers, ha ha. Go ahead and use them. Spread them on toast, like jam. No one cares.'
Six months later.
'Oh, and we're taking this character for our brilliantly original new team Stabby McSchnikt-bub, because everyone on the team has to have knives or claws, and she has claws, so clearly she's a perfect characterization match for this assassination team.'
Six months later.
'Oh, we're done screwing up this character, she's now pregnant with a wolf-god-baby and has severe PTSD because we put a relatively gentle Christian onto a wetworks hit-squad, you can have her back now, if you still want her...'
I doubt Pietro will actually come back pregnant with a wolf-baby** (!!), but the fickle creative who just saw DoFP and / or the Flash trailers and suddenly realized that speedsters like Pietro can be cool will lose interest as quickly as they developed it, and he'll go back on the broken toys pile, possibly with a bionic leg or blind or something suitably cruel that PAD will have to fix.
**Although my respect for Marvel's ability to be whacky and wild would go up.