several reasons
1) money --- its in the champs legue-- allows the team to get better
2) chelsea will be real hard to beat in the league for 2-3 yrs -- too much depth but money from champs league will allow a challenge
3) CHELSKI HASN'T WON IT -- it will

a double is quite possible but the odds are for the champs league -- chelski's depth over a season is hard to beat but in the champs league its not as big a deal