Probably not. MMW7 collects 80-91 Volume 1 of the Omni was 1-42 plus and annual and 2 other issues. So most likely a second omni will end around issue 86 is my guess (the Fred Hembeck Fly issue) so we don't need a volume 8 MMW, all the material in omni volume 2 will be out after MMW volume 7 is released.
However, who knows how long they will make us wait for that second omni, because it will take them another 3 years to release all the material we'd need for omni 3, so they might make us wait a while on it.