They've been saying they're not going to yo-yo guys, I can't imagine it'll be Leivo up for a week, sent back down Soshnikov up, send him down, and call Loov up, etc, etc.
I expect the 4 guys they use their regular callups on will be here for the remainder of the Leafs regular season.
Leivo, Leipsic, and Percy clearly they want to give these guys a shot, then Nylander is clearly coming up. Sparks is here already. Those 5 guys I figured might be their guys to give a look. Then they go Kapanen, Hyman, and Soshnikov here today. I'm not expecting them to go up and down giving a bunch of different players a chance, and it's just not possible to have 8 guys up 4 on regular recall and 4 on emergency recall. So I don't imagine they'll have any room for all these other guys they called up today. Unless Lou uses his magic to loophole himself into it.
It also could be a cap thing. Only Horton is on LTIR right now, they could be taking on contract and want to get as close to the cap as possible before they LTIR JVR or Lupul or Robidas, or all 3.