SpackleFrog
Smash showy bell-bottom pants and sporty haircuts
Yeah, if May goes after Brexit/non-Brexit the new leader may call an election at some point, though they'd be worried after 2017 and they'd also be accused of doing politics at a sensitive time for the economy. So, dunno. Suppose the 7 come into that calculation if they get a few more MPs and, crucially, some kind of organisation in seats around the country. I don't see much chance of that. Perhaps the practical outcome will be an agreement with the Libdems not to oppose each other whenever the next GE comes.
Don't rule out a GE with May as leader - winning a majority is about the only way she's gonna get her deal through. It might seem daft but her other options are 'cancel Brexit' or 'prepare for no deal'.
You've got to assume these 7 are hoping to add Lib Dems and a couple of Tories to their party. Soubry for example. They surely can't think they're going anywhere if they don't.