Warp Ammo, Disruptor Ammo and Overload will prove highly valuable Powers to have during this mission and it is advised to bring Liara and Garrus along. You will be faced primarily with Cerberus enemies, with some making their first appearance if you've not encountered them during Side Missions.
The Side Mission N7: Cerberus Fighter Base also becomes available upon acquiring this mission. If you still haven't completed the Side Mission Grissom Academy: Emergency Evacuation, it is recommended you complete it now as it will automatically fail after this mission. The mission begins immediately upon your next visit to The Citadel. This mission is acquired after the conclusion of Priority: Tuchanka. Priority: The Citadel II Full Walkthrough Getting Started