The phrase "new shield" refers to something that acts as a protective covering or defense mechanism that is recently created or introduced. Full definition
Yes, it's a lot, and I haven't even gotten to Wakanda, yet, where Captain America (Chris Evans), receives a nifty new shield from T'Challa / Black Panther (Chadwick Boseman). (killermoviereviews.com)
This risk may be lessened by purchasing a new accessory kit for the pump, with new shields and tubing. (verywellfamily.com)
I mean, Shuri has already given Bucky a brand - new arm and Captain America a slick new shield. (themarysue.com)