Thibaut certainly is, though it'll take something spectacular to dislodge Cech. Lukaku I'm not sold on, Bertrand probably is on the cusp of being first team ready, while Piazon, Feruz, McEachran, Kakuta etc. are nowhere near the levels needed to play 50+ games a season. If we don't retain Drogba, we should farm Romelu off on loan somewhere.