1. Multiverse holes are appearing.
2. High and dangerous levels of radiation radiate from the holes and threaten to collapse the multiverse... at least I think so.
3. A female version of Tony steps out with a capsule that has a baby inside.
4. She dies and Tony takes care of her son.
5. The baby's father is her Alternate verse's Steve Rogers
6. The baby is soothed by sucking on Tony's neck.
&. The baby gets sick and Tony has to go through the multiverse for a cure.
I hope my vague memories ring a bell for someone.