Oh, somebody mentioned CA monorail expansion... it's unlikely but the possibility remains open. Aside from the new monorail cars we're about to get, Disney every now and then comes back to look at the Monorail and costs.
Grand Californian does have an area that could be converted for use as a monorail station. That would be the most likely scenario if they ever did something. Original WestCOT plans called for a re-routed monorail track (re-using the existing track) that would no longer have stopped in Tomorrowland. It would have stopped at the Esplanade between both parks as well as a Hotel District South stop (near Paradise Pier, between it and DL Hotel) and another one further north where the "Magic Kingdom Hotel" was to have been. Incidentally, the Magic Kingdom Hotel eventually got built at Hong Kong Disneyland instead.
At this point, it's very unlikely any elements from the WestCOT plan would be implemented due to a) cost and b) what would now be heavy disruption to in-use guest areas. But parking areas north of DL Hotel are still earmarked for future hotel expansion and areas south of Downtown Disney are still earmarked for Downtown Disney expansion. There's actually a lot that still can be done at the Disneyland Resort when financial and market conditions improve for such things.
There was wild talk during the WestCOT days that we'd get Florida's Monorails and Florida would get never "driverless" cars similar to what Tokyo eventually got. I don't know how true that really ever was since our cars and tracks are entirely different. We'd completely have to replace all of our beams to get Florida's cars. I can't imagine Disney would go that expense. I'd imagine that Florida's track is not compatible with Tokyo's cars either, although maybe the design was different at the time.
Anyway, in short, possibly, in the future, Grand Californian would be adapted. Very unlikely, but not impossible, if we ever build a hotel north of DL Hotel, maybe another station there. That'd be about it.
I don't think we'd have business case for being able to charge for the Monorail like Florida can. Like someone said, ours, even though a more viable "transporation" system nowadays, is still really an attraction for most people.