Since most superheroes & villians get their powers by random accident I got to thinking about three different heroes that Dr Blake could of been
1) What if Dr Don Blake went to a science fair and got bitten by a radioactive spider. The bit grants him spider-man powers but the radiation blocks Odin from "suggesting" he go to Norway to become Thor robbing Midgard of it's Thunder God but giving it a Spider-Man with a twist, he's got a gammy leg :)
2) Dr Don Blake gets hit in the face with a cannister of radioactive material blinding him but giving him heightened senses. He goes to Norway to be the first blind man to climb the mountains there. He stumbles into a cave and finds the stick that turns into Mjolnir and KABOOM he's Thor again but blind!
3) Dr Donald Blake was the attending physician at a nuclear research facility in New Mexico when spots a young boy out on the test range. he heroic runs out to save him and KABOOM gamma bomb and he's the Hulk! Hulk the Angry god of thunder!
Let me know what you think and any other Thor mash-ups with Marvel origin stories