User blog comment:Godisme/Natsu's Strategy/@comment-2214433-20130517155752/@comment-7418318-20130517161655

She said she had no plans for stopping the Dragons.

She still might have had information that can come in handy. Or maybe she left instructions of how to operate the Eclipse Gate, enableing present Lucy to use it to send a small party 400 years into the past to enact the original Eclipse plan.