What kinds of explosive barrels will Divinity: Original Sin 2 have?

Larian has announced Divinity: Original Sin 2. The Belgian developers are going back to Kickstarter to fund its development. Larian founder Swen Vincke explained that they are crowd-funding the game because they felt that the funding and feedback they received from pledgers was crucial to the development of the first game.

This is a companion discussion topic for the original entry at http://www.quartertothree.com/fp/2015/08/12/what-kinds-of-explosive-barrels-will-divinity-original-sin-2-have/