They will, definitly. I expect both movies to fill about 1.5 waves of Rebels and Imperials, with maybe one iconic scum ship (although it is more likely that Slave 1 is going to take that part in one of the movies). The rest still has to be EU/Rebels, which I put into one pot, since Rebels draws so much from the EU.
Also punch me for forgetting about the amazing scummy LEGO sets of old and appareantly new (although I avoid spoilers, so I didn't look at any of this). I stand corrected on scum being marketable to a mainstream audience. I don't expect their lightness on ships to be changing in the new movies, though. After all both OT and PT just had Slave 1.
This time around though, they're doing a "Marvel Universe" affair, so expect a lot more going on in terms of characters, significant background detail, and foundations laid to build out from... I mean, they're already releasing books for non-major "scum" characters from TFA(!) (c.f. "Tales From a Galaxy Far, Far, Away: Aliens" - four novels based around "scum" characters and another one whose title eludes me about a female assassin character)
It's like getting the backstory for all the characters in the ANH cantina at release, rather than being filled in years later via the EU.
I am pretty sure some of these characters will have their own ships...

