No, it’s not likely.
Politics attracts self-interested careerists, and they nearly all come from the same political class. They vary from the somewhat self-centred to utter narcissists (like Trump and Clinton).
People like Sanders are rare, and they usually get nowhere at all. This was a golden opportunity to subvert the system a little—and it looks like you’ve blown it.
What you’ll get next time is a phony. Sanders has shown the establishment what younger people like to hear and what appeals to then—and next time they will more intelligently exploit that.
The main parties represent elite and oligarchic interests. A candidate like Sanders doesn’t, and usually the party filters out such candidates. Sanders—being from outside the political class, and an independent all his life—slipped the net, and somehow got through and almost won. They’re not going to let that happen again.
Don’t pin your hopes on a third party. The voting system, and the money required to launch an effective campaign renders that a pipe-dream.
And don’t think Warren is a saviour. She’s a bit better than most, but no Sanders. She knows when to tow the line—and did so with her non-endorsement of Sanders.
I think political change will have to come from outside pressures. Four years is a long time, so who knows. But you’re probably lumped with Hillary for 8 years. I think I’d honestly prefer Trump.