Silver Falcon 25
I don't see why lupin couldn't be more popular soon. People like it when several types of charecters are combined in one world. Like how kingdom hearts has all (or most) of the disney charecters, lupin has most of the "cool" charecter genres in his show. There's a wise sameri, an ace marksman, a theif that can steal anything, a pretty (and smarter than she looks) girl, and a clueless cop.
Well, not clueless...
Anyway, I can see why it would be popular, but people don't give it a chance cause
1. It's old. Unless they grew up with it, people won't give old stuff a chance
2. It's anime. Anime fans don't want to give it a chance because it doesn't have the modern look. Others only know of drama-ey anime or won't give it a chance because it would be too embarassing.
Also, it just doesn't get publicized well, but we all knew that.