He often doesn't do things "by the book" and will not wait for what he thinks is unnecessary red-tape. He will skirt around regulations and taunt the process the entire way. We've seen it many times before, and it's always purely in the benefit of whatever company he's helping at the time.

He has no problem throwing people/money/etc. at the problem to get the result he wants and if someone so much as says the opposite, they are removed from the equation (fired, publicly ridiculed, etc.).

I personally don't see what benefit he can bring to Twitter other than shaking up the culture. Who knows, he may even come in, take over, and claim to be a founder of Twitter, just like he did with Tesla.