BigWigs Countdown: Overwatch 

This addon is a BigWigs plugin and requires BigWigs to run.

Adds countdown voices from the heroes in Overwatch to BigWigs.

Voices are added for your current client locale as well as English.

The default countdown voice is set in "Sounds" and the pull countdown voice in "Pull" in the BigWigs options (/bw). You can also enable countdown per ability and change the voice for it in that ability's "Sounds" tab.

Note: Starting with the release of Echo, countdowns were shortened to three seconds.