I think it's doubtful you'd get her voided villager. Providing they moved out less than 16 villagers ago from your town. If they have moved out and you have completed the 16 villager cycle for that villager (so let's say Rudy moved out and since then another 16 have gone) then you have a chance of getting Rudy. Otherwise the game knows that you're still doing the cycle.
Rudy is actually in my town right now, as is Annalisa. Those same two villagers were the last two villagers to move from her town, so I know I won't get them as I already have them. I just wondered if I would get any villagers of hers before those two from her void into my town.