Well if they did take Great Britain, they would of been the largest Naval power in the World, wouldn't of had to much competition in the New World other than the French, Portuguese, and Dutch and Great Britain would of been Catholic.
I believe they would have ended up like the British Empire. They would have established a huge colonial empire and been unchallenged in naval superiority. America might not turn out the same due to them never having to hold a revolution to rid themselves of the English.
Even if they could successfully invade England and occupy the whole thing. How are they going to impose that Catholic King or Queen? Are they going to invade every time the English tries to overthrow them? What's going to keep England friendly to Spain and out of the New World? Wouldn't the invasion cause even stronger anti-Spanish resentment? Also the stability of Spain and their unmanageably colonial policy isn't going to change. If anything the invasion could make Spain weaker and less stable in the long run. They would be more Europe focused and less colonial. Making their colonial empire collapse quicker. Or at least not as big.
Probably the invasion would've been highly costly and bloody. So the Spanish would just put a Catholic Monarch on the throne and leave. Then 50 years later or so it gets overthrown. Meanwhile, Spain is running around unchallenged as they sweep up the New World. I think there would've been a series of wars between Spain and the British later and in the end they'd both be screwed over.
It wouldn't have. But if it did God would have spawned hundreds of thousands of dragon cyborgs to destroy the Spanish. Then they would have, inevitably, turned on God and eaten his balls with ketchup and baked beans. After this catastrophic incident France would be next, after claiming the British Isles, and they would eat all of the French people but kept a few so they kind dine on their fine cusine. Spain is shit so who cares. The Holy Roman Empire would have been crushed by them but Firenze would have been saved becase Ezio Auditore would have gone ape shit, and after but-fucking the dragons without them realising, stealth assassinate them all, twice, while eating a kebab, chatting up the remaining French women alive, watching Zeus talk about Desmond and reading a book all at the same time. He would then resest history using the Kah-gash.
The question of all time is, What of the French and Germans? would the French just go fuck it I know we catholic but you going down stupid Spanish, and would the Germans go well life sucks we should reconvert to Catholicism.
French were always friendly towards the Spanish, at least when the Austrian Habsburgs weren't cock-blocking France's expansion into the HRE.
