The numbers are so drastic that a release of a new camera would not affect them much at all. It's just the reality of a market that is changing. Be interesting when things all shake out who will still be standing. Remember Olympus was on the ropes...ready to go down until Sony stepped in to help them.
There was a 4% year-on-year drop in mirrorless camera sales, without a single Sony release. That's compared to the previous year, which saw thw A72, A7r2 and A7s2 all come out.
In contrast, both Canon and Nikon had multiple SLR releases in 2016, at varying price points. They still managed to lose 14% sales numbers, against a 2015 which saw few SLR releases.
So, yes, SLRs are losing ground heavily to mirrorless cameras, in terms of relative market share, and entry-level SLRs are also suffering against smartphones (although nowhere near as much as compact cameras).