Obviously, one would want to examine possible trigger events, such as other weddings in waking life, before too much interpretive work goes into this dream. This dream may be simple wish-fulfillment or personal anticipation. However, if you aren't in the midst of such activities, other scenarios may exist.
Initially, it is worth examining other commitments in your life. Are you becoming over-committed, or on the brink of making a major commitment to an employer, romantic partner, or other relationship? This dream may be commenting on how appropriate the commitment is for you. If the wedding goes well, you may see yourself as entering a sound union. If the wedding is a catastrophe, or your role in it is unclear, you may need to reexamine your commitments.