OK. The situation is a little fluid, so everything I'm about to write could change in a minute, but here goes -
As of right now, there probably won't be a special session of the legislature on Tuesday, and it is looking less likely that there will one at all.
As recently as Monday morning, the Arizona Capitol Tmes was reporting that Republican Governor Jan Brewer would call a special session for Tuesday to remove the members of the Arizona Independent Redistricting Commission for not producing district maps that are lopsided enough in favor of the Republicans.
However, by Monday evening, the Cap Times had posted a story saying that there definitely will NOT be a special session Tuesday. (Subscription required for both stories)
On the other hand, Steve Muratore at The Arizona Eagletarian is reporting (from KPNX's Brahm Resnick) that GOP senators have been advised to be at the Capitol for a closed caucus meeting at 12:30 p.m.
In other words, keep an eye on this. It is very possible that the GOPers are planning to try a sneak attack to remove the Commissioners on no real notice (note: the legislature long ago exempted itself from open meeting requirements including a notice period for meetings) so that there isn't enough time for opposition to organize at the Capitol.
There may yet be a "Day of the Long Knives", wielded by the Governor and lege and targeting the AIRC.