The phrase "vague plans" is correct and commonly used in written English.
Example: "We have some vague plans for the weekend, but we haven't decided on anything specific yet."
With the planned retirement after 14 years of its editor, Peter Stothard, there were vague plans to approach a high-profile figure, such as Martin Amis.
I go into the studio, I have very vague plans.
Mr Romney has vague plans to speed licensing and certification for new reactors.
Mr. Nafis had grand but vague plans, according to the indictment.
As for further expansion, the brand has vague plans for more stores.
They go north on 247, with vague plans to stop in Barstow for gas.
A man goes to an infamous witchy woman's house with vague plans to destroy her.
Last year he announced vague plans for "a punchy thriller" set in a hospital.
The company has floated vague plans to sell the car in some American cities in 2009.
His company is sitting on nearly $4 billion in cash, which he has vague plans to spend on acquisitions.
Indeed, when parliament voted on them, they had been watered down into vague plans for the future.
