The Meiri has three classifications of Scripture with respect to allegorical interpretation, those which must be interpreted only allegorically, those which can have an additional allegorical meaning, and those which may not be interpreted allegorically at all. The Meiri includes the creation of the world in the latter category which is forbidden to interpret allegorically.(Beis HaBechira 3:11, cited in Interpretation and Allegory, page 205)
Meiri's mention of chiddush ha-olam should probably be understood as referring to the fact that the creation of the universe ex nihilo rather than to the specifics of how it was created. (page 115).In difference to the tentative, reserved tone of this argument I will offer a tentative, reserved counter-argument, with my reader's knowing full well my ability to miss the obvious. From a philosophical perspective, I'm sure the practical concern with which the Meiri had in mind was Aristotle's (and/or Plato's) theory of the eternity of the universe. It seems to me, however, that this is not directly relevant for two reasons.