This is a big YMMV situation.
Channels removed (such as ABC Family, ESPNews, Disney, Disney XD) should return to any favorites list they were in. Channels replaced (such as FX and NatGeo) will remain in the favorites list as their replacement. If you choose to remove 136 and 186 from your favorites list I would not expect them magically return when the content returns to normal.
Newly added channels seem to add themselves to my favorites lists so it is possible that IF DISH drops and adds 136 and 186 when the content returns (instead of just changing the content, EPG and channel name) they would be forced on to all favorites lists. That is, if your receiver acts like mine.
I have noticed that lockouts seem to last forever. Back in the days of VOOM I did not subscribe to the VOOM package so those channels were locked and hidden (as I do with all non-subscribed channels to keep them out of my all channels guide). When those numbers got reused the channels remained locked and hidden. So there are some things that stay in the receiver despite the channels available/not available at the time.Timers
I have timers that exist for removed channels ... they don't record anything as the channel doesn't exist ... but if the channel existed again they should still work. The timers for 136 and 186 should just show up as "incorrect event" until the real channels return.