[quote=@Gimple]
I would definitely be interested in something like this. Unfortunately, I'm tied up for another two weeks and won't be able to put time into it until then. If this does become a thing, I think it would be cool if it got set just a little more in the future (maybe an additional 50 years?) so the potential for death rays and whatnot could be a thing, we'd just have to invent them.

If you elaborate on this plot and add more context, character sheet applications and whatnot, let me know. I'd love to take part in this.
[/quote]

What I'm thinking at the moment (and this is subject to change, of course) is that kaiju very abruptly start showing up and sometimes wreaking havoc in populated areas. They vary greatly in size and shape- some are just bigger versions of animals, some are like dinosaurs or other prehistoric creatures, others are just plain weird. No one is really sure where they come from or any details of their creation (that'd be one thing to research, for sure). They don't make a beeline for cities, usually, it's more a case of accidentally wandering into them. Think something like an earthquake or hurricane, albeit one that is a living creature that can be killed. Unlike what the movies would have you believe, it's not a phenomenon limited solely to Japan- you're just as likely to see Johannesburg, Omaha, Copenhagen, or Sao Paolo suddenly threatened.

Naturally, this is a game-changer for the world. The biggest concern people have are the occasions when a kaiju attacks a populated area. Think about the chaos after Hurricane Katrina- lack of government prep or response made things much worse. And this is such a new even that no one is really sure how to respond exactly. Sure, you can blast the crap out of a kaiju with tanks and artillery, but what if it breathes fire? What if it carries some weird disease? What if tanks and artillery just plain don't work on it? Not to mention the civilians trapped in the crossfire.

National governments have their own ideas and plans, of course, but where the PCs come in is a sort of standardizing of practices. They travel the world as observers and advisors to local governments that have to deal with a kaiju problem, figuring out the best ways to handle the general chaos. This especially comes into play with less developed countries- sure, the United States could fight off a giant monster and recover from the damage without outside help, but somewhere like Zimbabwe will need aid. 

As such, player characters are experts from all over the world whose skills lie in an area that would be useful in the event of a kaiju attack, as well as researching more effective ways to combat them. A couple of ideas off the top of my head- maybe a firefighter who's got experience in putting out massive urban fires and dealing with collapsed buildings. A biologist who is studying the creatures and their possible weaknesses. Or a soldier who is trying to work out the best way to use troops against a giant monster. 

As far as tech and research goes, I admit I haven't thought through it all the way. I don't want to do anything as formalized a s tech tree, but I'm thinking if research character have a specific goal in mind they can work towards it over the story. If somebody wants to build a mecha, don't expect them to roll out Gipsy Danger the very next day- there's going to be incremental steps of course. Not the least of which is getting funding to build such a thing. 

I hope this gives you a better idea of my thoughts, but I fear I've just made it more confusing!