I know, sounds crazy right? Just hear me out.
Yes, Spain was heavily pro Germany, but Franco was an opprotunist. He didn’t join the Axis powers in 40 because he wasn’t getting what he wanted. Now flash forward to 42-44. The Atlantic wall is impregnable! No one can breach it… unless…
Franco had geography, by 42 and def by 43 it was plain to see who was going to win the war. That would have been a great time to throw his hat in with the winners. Think about it, a safe landing site to funnel troops into Europe w/o the hell of D-day. A second front opened in 43 instead of 44? That is huge, and I am sure the allies would have paid that thug quite well to let them do it.
I am no Franco historian, so there may be a lot of reasons he would not have done this (coming to mind is the presence of foriegn troops in his country). But it is interesting mind candy. I wonder if there were any offers to Franco from the allies, and if there were why were he rejected them.