Apparently it is. If so, that would hand the CAQ (or whatever acronym will come out of this merger) at least four seats in the National Assembly. The two independent adequistes - Marc Picard and Éric Caire - would likely be next, though Caire left because he failed to win the party's leadership from current leader Gerard Deltell. Not sure how he would feel about a Legault-led party.
That leaves us with the eight other independents who came from Legault's original party, the Parti Québécois. The relationship, I imagine, is strained between some of these members and Legault, who's party is essentially a centre-right coalition a là Mario Dumont, which focuses more on the bread-and-butter issues than questions of sovereignty (though it is still a sovereigntist-led party, don't ever forget that).
Two of the independent members are already signed up for a "new" sovereigntist party called Option Nationale. Jean-Martin Aussant is its leader, and Jacques Parizeau's wife Lisette Lapointe is essentially an associate member. Lapointe, at the very least, is very unlikely to join up with the new party. Aussant isn't likely to either, though I know less about him.
Two others who left with Lapointe in the first round of defections from the PQ are Pierre Curzi and Louise Beaudoin. Curzi is essentially waiting for Marois to get out of the spotlight, while Beaudoin is... I don't know. I don't think either are likely to join the Legault grouping.
That leaves four other independent members. One, René Gauvreau, was kicked out of the PQ caucus because of some matter concerning his riding association's finances, not due to ideological squabbles with the PQ. He's not going to jump ship. The same goes with former Liberal MNA Tony Tomassi.
The other two are more interesting. Daniel Ratthé is one of the twelve members that asked Parizeau to essentially shut the heck up, but when that didn't get a nice reaction from the pequiste HQ, he had to leave the party. He's a definite candidate to jump over to the CAQ.
Benoit Charette left because he wanted the PQ to promise not to hold a sovereignty referendum if they were elected, at least not within the first mandate. That puts him square into Legault's category of sovereigntist-but-let's-wait-a-little-while. If he doesn't shack up with the new party sooner rather than later, then I'll be very surprised.
So, by the end of the year I wouldn't be surprised to see at least eight CAQ-ADQ members in the National Assembly. It's way too early to tell if the association with the ADQ is a good idea or not for Legault. After all, Dumont's leadership was the main factor in bringing the ADQ up, but the party itself caused its crash a year later. Interesting to see how Quebeckers view the new party when some actual, tangible faces are put under its roster.