If you could swap a Dota 2 character for a League character..

Nidalee for Meepo - because I want both games to suffer

On a more realistic note, probably Enigma for Katarina. Enigma would be a great jungler if his Eidolons were programed to follow him and attack whatever he's attacking, and I would simply love to see how hard Katarina would rape in a game were most spells have an high cooldown, all have mana cost, poke is rare and you can get an item which makes you immune to CC.

silenc--- pud--

god no. none of them

If you swapped Ashe with Drow Ranger, no one would notice the difference. Besides the fact that suddenly, "Drow Ranger" would have a stun and "Ashe" would suddenly get pretty damn high damage.

On a serious note, I'd love to see how Dota 2 handles Yasuo or Zed and how League would handle Invoker.

kassadin for Anti-Mage, to show league a true antimage character

Pugna for Urgot. Decrepify would introduce new forms of CC effects that would be so good. Nether wards plox.

Winter Wyvern for Veigar More new forms of CC.

Axe for Garen More new forms of CC.

Bloodseeker- Ult yasuo/nid/kalista and watch them explode

Swain- build a bloodstone and stay in crow form forever

Broodmother for Riven. Because Riven would be balanced in DotA (actual point-click CC makes Riven cry), and Broodmother is my main in DotA, and I'd like to see that kind of stealth mechanic in League

I'd love to see either Nautilus or Udyr rebalanced for Dota. They are both really cool and unique character designs with many ways to go gameplay wise.

Meanwhile in league, I'd throw in a melee carry that can actually replace a ranged carry. Sven and Wraith King are good choices (especially if you want to hear squishies cry). Or I'd add in Tusk because Tusk.