Will we ever get Karma tether mechanic back in a tank-form?

Karma used to have some interesting mechanics. She's a good pick now, but a lot of her nice mechanics were lost when she was changed.

One of the main ones was a tether that affected anyone passing through it. When she was getting changed Riot mentioned that they thought the tether was interesting but was more suited to a tank.

For anyone unaware, Karma could create a tether between an ally or enemy (including minions), speeding them up or slowing them down. Any ally or enemy passing through the tether would also become faster or slower and take damage. When she ulted it the slow was doubled, hence "Karma always catches up to you" as she was sped up by 40% and they were slowed by 40%.