Scala is a language, not a framework. You can use Spring with Scala too [1]. Personally, I wouldn't use it for an enterprise project just yet, because of its compatibility issues. And why on earth Java SE? The enterprise edition gives you everything a standard edition does, plus libraries for messaging, transactions, persistence, basically everything you need to write a large scale enterprise app.

[1] http://www.infoq.com/articles/scala_and_spring

While Scala is not a framework, it can be used with many Java libs. It isn't necessary to use xml-heavy frameworks and app servers to write "enterprise" apps. Endless layers of OR-mapping and xml is not productive. There are endless messaging and persistence solutions available without resorting to xml-obsessed JEE and Spring.