I think we've all seen the true value of Harper already, and it exceeded anything we (or even ownership) could have anticipated. Star power is fun. Beyond that, we'll see (and he'll have to produce to maintain the shine).
Manny will probably put up more WAR than Bryce over the next 10 years (just because of defense and position alone, especially after Harper leaves the OF) but honestly I think the whole free agent saga is already forgotten. If he'd gone to a bigger-name team the media might be on it more. If we ever play the Padres in the post-season it will become a storyline.
I really hope Franco keeps it up. Extremely small sample and batting order shouldn't matter as much but he went right back to being 2017 Franco batting 5th. The IBBs are a big part of his OPS but the power's been impressive (and always was).