Segwit2x is the biggest problem, since it's a direct attempt to takeover Bitcoin, other forks are a smoke screen to scare people from potential forks (all this FUD that Bitcoin will crash if there will be split), while presenting Segwit2x as true Bitcoin. The real fight will be when miners with their 85% hashing power will fork into 2mb blocks in November, I hope people won't get themselves fooled.
So, the REAL BTC will be that BTC with most hashrate power?
not exactly. things aren't as simple as that. so you can't say big hashpower has the most power and small hashpower has the least or no power.
there are a lot of factors that will play a role in this.
the high hashpower helps a lot because it is securing the chain against splitting, 51% attacks, etc.
but as i said other factors such as nodes on the network which are crucial, exchanges to list these and then the price that will be decided on these exchanges, and finally one of the important ones: merchants. which one they choose can easily change a lot of things. and in fact splitting bitcoin, or even threat of splitting can mean they stop using bitcoin for good no matter what happens! so it may end up being a lose-lose scenario instead of one side winning...
Always think of 2 safeties here technical = hash-power AND economical = long term physical investments + energy