I'll bite. Both fan bases have some reasons to be optimistic, it just depends on your perspective.
From a CSU fan's pov: we got better as the season progressed, the players have another year in the system, jmac is getting better and more comfortable at being a head coach, Grayson looks decent so our qb play shouldn't be as anemic as it's been in the last few RMS games, even though we acknowledge that Washington State gave us the win we were still competitive with a team that probably would have beaten CU last year (I realize you beat them the year before), we won 8 games and even if the competition wasn't great just winning is a positive step, CU just isn't very good and isn't scary.
What CSU fans try to forget: we didn't beat anyone last year with a winning record and weren't really competitive in our loses to half decent teams, we might have been the sorriest 8 win team in the country, we lost to CU and couldn't move the ball, we looked even worse in a loss to Tulsa, we lost a guy who scored 31 TDs - who will replace that production?, the Oline is unproven and might be worse than we are imagining them to be - especially early, history, Grayson might have been decent and broke records but he never looked dominant, we've been a slow starting team the past few seasons - could be partially due to how the schedule works out.
From a CU fan's perspective: you beat CSU by a decent margin last year, how can CSU not be worse with the personnel they lost?, CU will be better with another year under MMac, MMac doesn't lose to JMac, CSU gets worse recruits and is less talented, history.
What CU fans forget: CSU really did get better as the season went on and was definitely a better team at the end of the season compared to game 1, CU would have probably been blown out by Washington State, the degree to which CU recruits are more highly touted and more talented isn't as significant as you'd hope (not saying it doesn't exist though), CSU probably has the better QB (at this point in time), CSU probably has better special teams, this series has been closer lately than history would indicate.
Truthfully, this is a game between two bad to mediocre teams and no one really knows where along that scale they will be. It will be interesting to see if one or both of the teams takes a step forward. I'm expecting a close game and either team winning won't surprise me. Good luck the rest of the way, the state could sure use some college football success.