An investment group that inked a contract to buy the 47-story Worldwide Plaza office tower is expected to meet today to discuss their options — including filing a lawsuit — after Deutsche Bank nixed the deal.

The group, which includes commercial real estate company George Comfort & Sons and RCG Longview, yesterday said they are “ready, able, willing and eager” to close their deal.

“We have an executed sales contract, a significant hard deposit in place and even a closing date of June 30 from the seller’s attorneys. We are ready to close,” said Peter Duncan, president of George Comfort & Sons.

Sources said Duncan has refused to accept the return of a $50 million deposit on the tower at 825 Eighth Ave.

The investors were told Friday that Deutsche Bank’s board nixed the pact under what sources explained was a “last-minute,” “customary-approval” clause. Deutsche Bank took possession of the building from Macklowe Properties, whose real estate empire has collapsed due to the recession.

“They [the Comfort team] are discussing all their options and would like to resolve this in their favor without a lawsuit,” said a source familiar with the matter. “Everybody was so stunned by this [that] they have to figure out a strategy.”

As part of the deal with Comfort, Deutsche was to reduce an $800 million-plus mortgage to around $450 million and form a joint venture with the buyers to capture future upside. Meanwhile, the buyers would inject $175 million worth of equity into the transaction.

The Comfort group was told it could submit another bid by July 15 to investment brokers Eastdil Secured.

A Deutsche Bank spokesman did not return a call for comment. Eastdil and RCG Longview declined comment.