Yes, it appears that superweeds may currently be in 'production'... inadvertently.

An article by Tom Clarke in the British magazine, Nature, says the problem is apparently cropping up with the wild relatives (weeds) of the GM crops. The pollen of one of the GM crops, yellow-flowered oilseed rape (Brassica napus) seems to have gotten into the atmosphere and pollinated a few wild relatives, bargeman's cabbage (Brassica rapa) in England, a place that has never allowed GM crops.

From the article:
"Opponents of transgenic crops in Britain and much of Europe fear that genes for herbicide tolerance or insect resistance in yet-to-be-introduced strains might spread in pollen to form invincible weeds... How human-inserted genes move, and whether they persist in the environment, are the ultimate questions... It is a single piece in a very large jigsaw..."

The problem is that GM crops were planted, forced onto other countries, and put into commercial use without any information WHATSOEVER as to their consequences.

Wouldn't it be amusing to discover that our ignorant scientists and politician have engineered the eventual end of mankind?

How do you prepare for THAT?