Monorail and PeopleMover Fanatic
I personally think the station replacement going on at Poly and potentially Contemporary might include some necessary station reconfiguration for née trains.I don't understand the hesitation to replace the fleet (yes, I know, money...). Would make perfect sense to have it updated for the 50th.
Here's a super-rough timeline for DLR vs WDW monorail fleet:
1959-1960: Mark I (2 yrs)
1961-1967: Mark II (6 yrs)
1968-1987: Mark III (19 yrs)
1988-2007: Mark V (19 yrs)
2008-Current: Mark VII (13 yrs)
1971-1988: Mark IV (17 yrs)
1989-Current: Mark VI (32 yrs)
Anything jump out at you?
But just pure speculation on my part.