Amazon America currently has LEGO Super Heroes Darkseid Invasion on sale for $47.99 (reg.$69.99). Savings work out to be 31% off. In order to get your order before Christmas, you need place your order before Tuesday, December 22nd using Two Day Shipping.
Other deals
-30% off Ultra Agents Riverside Raid $8.39 (reg.$11.99)
-30% off Pirates Shipwreck Defence $9.09 (reg.$12.99)