First and foremost, I like that this thread was titled Supergirl to be in Smallville, and when you posted about it you decided to use the spoiler tags.
Secondly, season six wasn't as bad as people are making it out to be. It was by no means the best season they have released, but even so I enjoyed it.
Third, as was mentioned, Supergirl has already been touched on. Season 3 finale, for those who forget. (Kara was hot, on a side note.)
And finally, as was mentioned already, it would be nice to have some future villians, as opposed to having Hero Cameos all of the seventh season. They have done enough, and I personally think that Justice should be the nail in the coffin. It would be rather interesting if they had Grundy or something like that make an appearance.
This has kind of been done already. As stated before in this thread, it'd be nice to see Clark fighting more supervillains like in the episode "Combat" instead of meeting new heroes all the time. Thus far, that has been the best fight in this show (in "Combat") because Clark & the villain weren't just throwing each other around like the usual fights that happen. I want more fights like that where Clark is getting his ass kicked & the fight is going back & forth as well. Non superpowered villains is getting old. It got old two seasons ago. I do want to see Kara on Smallville but it was kind of stupid to already do it just to redo it four seasons later. Let me guess, next Zod's going to be redone & it's going to be revealed that the Zod we saw was a poser.
__________________ "It wasn't even about the eggs. Quite frankly I like the eggs, I don't have no...problem with...It's just there's always been a lot of tension between me & Lois. It's not so much as I want to kill her...I just want her...to not be...alive anymore. I sometimes wonder if all women are this difficult. Then I think to myself, wouldn't it be MARVELOUS if I turned out to be a homosexual?"
SUPER GIRL WAS AMAZING!!! Season 7 definitely picked up really good for Smallville!!! The DVD actually comes out tomorrow, September 9th!! I hope everyone gets there copy because I will be in the stores first thing tomorrow!!! I saw some pretty cool trailers at the Smallville's official website...