It's hard to say with Lego. It took a long time for megaphones to replaced with two actual blasters in the Star Wars line. Years later, and I think we've only seen two new blasters, and one of them is just a smaller variant. Nor have there been all that many lightsaber designs, and only now are we getting real green blades. Poor Han Solo is still in desperate need of a broom-handle blaster. However in other themes we have seen new ray guns and the like.
In the Fantasy realm: for Prince of Persia, the prince just got more or less standard katanas in a nifty new back holder. But they did make a Dagger of Time. It also cleary wasn't meant to be a major theme. For POTC we saw a new sword for Blackbeard, but sadly no cool rapiers for anyone else (although the Musketeer sports one). For Kingdoms, we've seen a new weapon color and crossover weapons from Heroica. Sadly Harry Potter never got better than a normal bar piece that was oversized for a wand. Here though Lego was trying to capitalize on an end of line, and not trying to start a new one.
Even a couple of years ago I think Lego would have gone with normal molds for this line, but the tide does seem to be changing. Lego seems to be pretty excited about a license that will allow them to really showcase their love of castles. There is also a need to make these figures interesting to kids. Most of the characters in the stories rarely wear armor, so giving Aragorn a cool new sword will certainly enhance a figure that would be in an otherwise drab outfit. So my guess and hope is that Lego will be smart enough to make these figs as interesting as possible.
"He is a very shallow critic who cannot see an eternal rebel in the heart of a conservative." - G.K. Chesterton