This came, oddly enough, from looking at an old copy of the "Mortadelo Y Filemon" [1] comic from the 70s (I lived in Spain from some years as a child). The secret agents clearly inhabit a Spain which has more international weight than OTL, sending agents on secret missions all over the world, with its own space program, etc. (even if the streets all seem to be cobbled). 
So, inspired by my fond memories of this comic - with PODs after the US becomes independent, create by the 1970s a Spanish-speaking superpower or perhaps an alliance that counts collectively as a superpower, led by a Spanish-speaking state. So what would be the least unlikely case? Mighty Mexico? Super-Peru? A unified Iberia with south Italy and other bits thrown in? (Spanish-Bourbon wank, I guess.
) A Spanish Empire that at least partly survives as some sort of federation?
thoughts?
Bruce
[1] http://en.wikipedia.org/wiki/Mort_&_Phil
So, inspired by my fond memories of this comic - with PODs after the US becomes independent, create by the 1970s a Spanish-speaking superpower or perhaps an alliance that counts collectively as a superpower, led by a Spanish-speaking state. So what would be the least unlikely case? Mighty Mexico? Super-Peru? A unified Iberia with south Italy and other bits thrown in? (Spanish-Bourbon wank, I guess.
thoughts?
Bruce
[1] http://en.wikipedia.org/wiki/Mort_&_Phil