Hopefully yes, probably no. Look at attempts to mobilize a third party via the Internet (Americans Elect). Didn't work.
One of the other big problems with Americans Elect is that it didn't have an ideology or stand on any issue really, thus people had no reason to join it. You would need to have a single ideology left unrepresented by either party with enough followers to supplant one of the two and it would need to be an ideology that doesn't necessarily fit better into one party than it does the other (otherwise it would just be absorbed).
