I'm on that same flight the next day....will be interesting to see what's on the menu. (am currently in Y, but Y's oversold and am hoping for an op-up or upgrade, but if not, at least I've got a Row 31 aisle).
I flew JFK/LHR a while back in J, and as with other posts on this, can remember plenty of great breakfast choices. And, maybe it's just me, but the F/A's always seem "nicer" when it's a breakfast service/time. The F/A's drizzle the syrup on your French Toast for you (you say "when" to stop) and they spoon the fresh fruit on your bowl of cereal for you, etc. etc.