The Nestle-Aland Novum Testamentum Graece (Greek New Testament) releases in its 28th edition soon. Here is a description from the NA28 Website:
The long-awaited 28th edition of the Novum Testamentum Graece has now been published. Once again the editors thoroughly examined the critical apparatus and they introduced more than 30 textual changes in the Catholic Letters, reflecting recent comprehensive collations. With the intent to make this book more user-friendly, the editors also revised the introductions and provided more explanations in English. This concise edition of the Greek New Testament, which has now grown to 1,000 pages, will continue to play a leading role in academic teaching and scholarly exegesis.
Prof. Dr. Holgar Strutwolf speaks more about it here: