We want YOU to protect the earth!
So here's the scenario.
DC and Marvel merge. Suspend disbelief for a second. The nations of the world got together and decided to outsource planetary defense to you.
You get:
1- an unlimited budget.
2- diplomatic immunity
3- a kickass car
4- Scarlett Johansson as your secretary, because lets face it you were thinking of it since you started reading
How would you best defend Earth. You can only pick one option
1) Buy a self replicating GLC ring from Ganthet, cause he didn't buy his Zamaron lady friend anything for valentine's day so he needed cash for some bling ASAP, along with a battery to start your own branch of the corps.
2) Make the Worldmind your ***** and relocate the Nova corps to Earth.
3) Shield - whatever it is they do
4) Subcontract to Von Doom
Lets assume that this happens somewhere before Zero hour and WWH respectively for each of the big events. You have no knowledge of the things that are going to come your way, only that Earth gets invaded way more than any other equally shitty planet out there.
Feel free to write in your own strategy as long as its not out there like hiring the Beyonder or an army of Krypto-clones.