Here's my prediction: She is paired with Jim Gardner at 6 pm only. For the time being, that is the only newscast she does on a regular basis.
My reasoning: Reports have said she has to "ramp back up" to anchoring. I think doing a schedule that would include the 6 and 11 pm casts would be unadvised for someone coming back to work from a long (three years) medical leave. She can always join the 11 pm cast at a later time if all goes well.
LTL is too big of a draw to have her on anything but the evening newscasts. Possible exception: is she does one early evening newscast AND noon.
I think she has stated previously that she it not a morning person: you won't be seeing her 5-7am.
And, a previous post had Gary Papa saying it will be good to have her back, suggesting that she will be on a newscast that he is on.
One other possibility - a bit different, but when you're making room for a big name to come back and you have a full slate of anchors, an outside the box approach may be called for.
LTL anchors 5-6pm. In one half hour, her co-anchor is Rick Williams. In another half hour, her co-anchor is Monica Malpass. Sarah Bloomquist gets bumped from the noon newscast and Monica returns to co-anchor noon with Rick as they did previously. A win-win-win??? LTL goes back to the newscast she is best known for (5pm). Rick and Monica each still get to anchor one hour of news per day, including part of the 5 pm newscast. And they get to remain a team on one newscast per day (noon). Sarah Bloomquist assumes the previous Michele McCormack roll of being the primary substitute anchor for mornings and weekends.