You keep using terminology that doesn't exist, so I don't know what you're actually asking.
What he has: PREMIUM Annual Pass to Disneyland
What he wants: PREMIER Passport, which works at both Disneyland and Walt Disney World.
I have already stated my advice how to help. The issue is that his renewal date for his Disneyland Premium AP is before he wants to buy the Premiere Passport. The best thing he can do depends on what he wants to do as far as Disneyland is concerned:
If he wants to go to Disneyland sometime between 2/22 and 3/2, he has to either renew the Disneyland AP or buy the Premiere Passport outright. If he buys the Premiere Passport, he can make FP+ for his WDW trip. If not, he'll have to also have a WDW MYW ticket linked to his account.
If he has both a WDW MYW ticket and his Disneyland AP, he cannot use BOTH to combine to produce one Premiere Passport. It just doesn't work that way. All he can do with that MYW ticket at this point is to hold it for next year.
If he does NOT want to go to Disneyland between 2/22 and 3/2, then he has absolutely no reason to renew his Disneyland AP in the first place. Just buy the Premiere Passport outright. If he's not going to be at Disneyland before his WDW trip, however, he can't buy the Premiere Passport in advance, because it can only be bought in person.
So that means that if he DOES NOT want to go to Disneyland between 2/22 and 3/2, he can buy a WDW MYW ticket, link it to his account, and make his FP+. Then when he gets to WDW, use that MYW to upgrade to the Premiere Passport.
I know this is a complicated answer, but frankly that's because it's a complicated question with a decent number of variables that weren't defined in the original post.