I honestly think if Sturridge is given the right amount of time, he could prove to the be the next big thing not only for Chelsea but for England. The guy scored a cracker against Ajax, and impressed so much already this season. He has improved already so early in the season, and don't forget he was our top goalscorer in the FA Cup. Aguero, if he comes or not, would be a helpful addition because he can also play as a winger. For me, the only striker i can see is Lukaku who could be the person to replace Drogba. With Lukaku and Sturridge it gives the right strike force, but also with the promising talent of players like Borini and Mitrovic, you have to think what could they turn into as players. Drogba has about another three seasons in him yet before he will start to tire out, but i don't know if he will not play any longer or so, because based on recent performances, the guy could possibly play till he is 40.