Welcome! You don't say if you have status, because that as well as when you requested the upgrade will have some bearing on your success. I've not had any upgrade requests fail on this flight, but of course your mileage may vary. And weekend flights tend to be tougher than midweek flights.

Flights will often open with upgrade seats available, and as they get taken, seats that remain unsold will be released for upgrades as the flight date approaches.

Hmmm, that flight is showing J7 D0 I0 Y7 B7 H7 K7 M7 V7 S7 W6 G7 N7 Q0 L7 O0, which to me tends to predict you won't be lucky - no "I" or "D" class Business seats are available for sale, four months out (only 7 or more full price "J" seats.) Nonetheless, if Yield Management's dreams don't happen and they don't sell all the "J," seats will open very close to the flight date / time.