Speaking of 'end of epi 25'
I'm guessing the highlight would be
Granstone knights vs
Shiseiken
( Why do you think there's 5 of them 
)
Lancelot (Suzaku, Llyod) vs
Guren Mk. II (Kallen, Laksharta)
(For both the creators and their pilots)
Lelouch (in Gawain) vs
Schneizel (in Avalon)
(1 last mind battle for the season!)