Several studies have been published to date about the use of Augmented Reality (AR) as a breakthrough technology in education, but most of them focused on the impact of using prepackaged information on student motivation and engagement. This paper analyzes the affordances and limitations of AR in second language learning, emphasizing its potential as transformative rather than delivery technology in teacher training programs. The novelty of this research is that it examines the attitudes and creative skills of pre-service teachers to meaningfully integrate AR-based projects aimed at teaching English from a Computer-Supported Collaborative Learning model. The sample size was 229 Education students from the University of Alicante (Spain), who created 47 vision-based and location-based projects through different authoring tools, and utilized them to teach English to children. Quantitative and qualitative data were gathered through a pre-post-test, teaching experience videos and class debates. The research findings revealed that the teacher candidates lack practical training in AR content creation and implementation from a technological and pedagogical perspective, but their attitudes towards AR integration as transformative technology were very positive, particularly regarding student attention, collaboration and shared enjoyment. Spearman's Rho correlation coefficient also demonstrated a relationship between positive attitudes towards AR integration in EFL and the level of difficulty perceived by participants.