As we have noted in the past, December is the month in which there are leaks about forthcoming budget proposals. There seems to be a steady drip of news about pre-funding retiree health care, which (as is the case at UC) is usually handled on a pay-as-you-go basis. Outgoing state controller (and incoming state Treasurer) John Chiang has discussed the issue recently. Today, there is a piece in calpensions.com about it.
Assuming there will be a proposal, it's likely to have increased employee contributions as part of the package. Even if the proposal is limited to non-UC state or public employees, it is likely that there would be pressure on UC to follow.