Two of Canada’s largest media companies may be joining forces in a legal challenge to derail Shaw Communications Inc.’s $2-billion acquisition of Canwest Global Communications Inc.

Sources confirmed that Rogers Communications Inc. and Quebecor Media Inc. are considering supporting a group of disgruntled shareholders, including the founding Asper family, who are preparing to ask a court to reject Shaw’s takeover deal and force an open auction for all of Canwest’s television assets.

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Thanks to Wayne in Canada South for this story.