[Sweed]

I believe the game uses a team's ID number to make the schedule, or anything else it needs a specific team for. As long as you only change the name you should be fine. As always BACKUP before making changes, just in case.

I play a standard MLB setup that started in v4 (2002) that I've imported all the way to v25. In that time, in MLB, I've changed things like "Chicago (N) Cubs" that was the default to "Chicago Cubs" and had no issue with schedule being generated. I did this also to the three other teams that had league designations in their names, ie White Sox, and both New York teams. Also in this time I had to rename the Expos to the Nats, Devil Rays to Rays etc. Again no scheduling issues. Then add in the multiple minor league teams that went through name changes and locations without scheduling issues.

As long as you are waiting for v26 have you considered making the changes now in v25, and then they should import into v26? I would make a backup of your league, make the name change there, and then simulate forward to the next season to confirm the schedule works out. You could also get a head start on uniforms, logos, ballpark, etc. etc. and have that all ready to go when v26 releases.

If for some reason something goes wrong you still have your original v25 game in tact and could import that into v26 and make the changes there. I don't think there is any reason the schedule will go wrong due to the name change, or anything else for that matter. But it is always best to be safe with a backup before making any changes.

EDIT:
The one thing that gives me pause is you are playing a historical season where there are a ton of options. Real lineups, how real players come into the league etc. etc.
Again I'll still say that team ID is the key, so I think it all still works. Could be another historical player comes in with a bunch of potential problems? My game started MLB and became fictional through attrition, meaning I'm no expert on the ins and outs of historical. With that in mind, unless a historical guru comments in this thread with better information, I would definitely sim ahead in v25 from a backup to see what happens.