Why weren't Hikari and Takeru with the 2nd generation Digi-destined in Digimon Tri? In the beginning of episode 1 of Digimon Tri, we see glimpses of the second generation Digi-destined (Davis, Yolei, Cody and Ken; sorry I only know their English dubbed names) being destroyed by what looks like Alphamon.

Hikari and Takeru are technically also 2nd generation Digi-destined, so why weren't they with Davis and the rest when they confronted Alphamon?
Now that the last movie has been released, we learn that


   Daisuke and the second generation DigiDestined discovered Yggdrasil's plans quickly, and were quickly dispatched of at the orders of Himekawa.  As it turns out, Mr. Nishijima placed them in the Digital World at Himekawa's orders.


During the events of the final move, we learn that


   They are in the Digital World, in a life-support chamber room of sorts.  It is not entirely clear if they were on the verge of death, or if they were deliberately hidden there, but it is implied that they did sustain some physical injuries.  They are transmitted back to the real world as a dying act by Nishijima, since the room they were in blew up after they had been transmitted.


Unfortunately, they don't feature much at all during this movie series.