For sure, that's possible and a standard clause in those contracts. All I'm saying is that because it's certainly suboptimal to send a player back to another league mid-season, that the Sabres will make a VERY careful educated decision on where he's most likely to flourish next season so switching leagues could be avoided if possible.
I think the 2 key factors that will influence their decision will be Rosen's performance at the re-scheduled World Juniors, and then how developed they think he is physically when he gets to development camp. If they have serious doubts about him being physically ready to play in the AHL this year, I think they'll look to send him back to SWE right away so they can avoid that mid-season transfer. Unless....
....Unless he's eligible to play in the CHL and gets drafted in the import draft by a team that the Sabres feel is a strong team in terms of developing prospects. I know this option wasn't mentioned in that article or anywhere else, but it's something that
@Chainshot and I have been talking about since Rosen signed and both feel like could be the ideal option for him if he's not physically ready to play in the AHL, and take the same path that fellow 2021 Swedish draftees Olausson (COL) and Lysell (BOS) took by going to the OHL and WHL, respectively.
Until I hear the Sabres or read a reporter say that is not an option they're considering, or if he's not selected in the upcoming CHL import draft on July 1, I will assume it's still one of the 3 possibilities the Sabres are considering.