sasuke had walked into the remains of the last orochmaru lair, which happened now to be discovered space that the vilage that used to be the hiding spot for the hidden sound found. he looked at the remains of the lair as he was wondering if this was going to bring anything special.
this brings back old memories he silenty said to himself...

As the animal Pein walks in the arena, he looks at Sasuke with his Rinnengan eyes

Let's see how strong are you...

sasuke notices pein and immediately activates his sharingan.
he must be of the akatsuki
sasuke stands awaiting pein's move.
ready when you are, but if i win, you shall tell me my brother's location.

Deal...
The Animal Pein puts his palms on the ground, summoning five other Peins in Akatsuki cloaks

sasuke places his hand on the ground. a wave of lightning quickly moves across the ground, and connects with the old pein.