The 35 year old Ivory Coast International desires to finish off his career in a top level Club & the Spanish League - LA LIGA motivates the player. Drogba is said to realize that a possible arrival at Barça would be to "help out" & that his role would be more secondary than in the front-line.
New Barça Coach Tito Villanova is said to see the proposition as interesting & worth of study as a player with the experience & strenght of Drogba could give Barça more alternatives upfront as rival Clubs have figured out the way & tactics to halt the winning ways of Barça.
Rumours have it that talks could being after the Spanish Cup Final , while other Clubs are also interested like AC Milan.
Stay tuned. I think its a no-option, but Football does surprise.