Yes. Shira was in Ice Age Collision Course.
As of September 2013, there is no indication there will be another Ice Age film so your question is impossible to answer.
No.
Yes
The Siberian saber is Shira, and the regular saber is Diego.
shira
No
Shera is a saber tooth tiger in Ice age 4
Diego (voiced by Dennis Leary in all three movies)
The Siberian saber is Shira, and the regular saber is Diego.
Shira
Shira
I take it you mean Shira from Ice age, which would be the actress Queen Latifah.
shira
shira the white tiger
Shira
Sid, Manny, Ellie, Peaches, Diego, Shira, Captain Gutts, & Granny.
saberttooth tiger and she is voiced by Jennifer Lopez
Jennifer Lopez is Shira .
Diego
No