Oh I do hope not!! There is life in the old girl yet!!
I do prefer the Radiance class over the Vision class but if Brilliance is not replaced it only leaves 3 ships in the Med next year (Symphony from Barcelona, Odyessy from Rome and Explorer from Venice if you don't count Rhapsody since she is moving between Cyprus and Hafia.
Not much choice and the prices will skyrocket so a 4th ship in the Med will be welcomed.